We introduce discrete multivortex solitons in a ring of nonlinear oscillators coupled to a central site. Regular clusters of discrete vortices appear as a result of mode collisions, and we show that their stability is determined by global symmetries rather than the stability of constituent vortices. Stable multivortex solitons support complex vortex dynamics including charge flipping and spiraling.
© 2011 Optical Society of America
Original Manuscript: October 10, 2011
Revised Manuscript: November 11, 2011
Manuscript Accepted: November 11, 2011
Published: December 15, 2011
Daniel Leykam and Anton S. Desyatnikov, "Discrete multivortex solitons," Opt. Lett. 36, 4806-4808 (2011)